Vehicle door windowsill support bracket



FIG. 1 is a perspective view of the vehicle door windowsill support bracket. The broken lines showing of the interior of a vehicle door in FIG. 1 is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a top plan view thereof, shown at an enlarged scale;

FIG. 3 is a front view of FIG. 2; and,

FIG. 4 is a side view of FIG. 2.

The bottom and rear surfaces of the support bracket form no part of the claimed design. 

The ornamental design for a vehicle door windowsill support bracket, as shown and described. 